package com.jmrztht;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;

public class Counter extends HttpServlet {

	private static final long serialVersionUID = 1L;

	public Counter() {
		super();
	}

	public static void writeFile(String filename, int count) {

		try {
			PrintWriter out = new PrintWriter(new FileWriter(filename));
			out.println(count);
			out.close();
		} catch (IOException e) {
			//e.printStackTrace();
		}
	}

	public static int readFile(String filename) {
		File f = new File(filename);
		int count = 0;
		if (!f.exists()) {
			writeFile(filename, 0);
		}
		try {
			BufferedReader in = new BufferedReader(new FileReader(f));
			try {
				count = Integer.parseInt(in.readLine());
			} catch (NumberFormatException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
		} catch (FileNotFoundException e) {
			//e.printStackTrace();
		}
		return count;
	}

	public void init() throws ServletException {
		// Put your code here
	}

}